EP 2643392 B1 20141231 - PREPARATION METHOD OF SUPERABSORBENT POLYMER
Title (en)
PREPARATION METHOD OF SUPERABSORBENT POLYMER
Title (de)
HERSTELLUNGSVERFAHREN FÜR EIN SUPERABSORBIERENDES POLYMER
Title (fr)
PROCÉDÉ DE PRÉPARATION DE POLYMÈRE SUPERABSORBANT
Publication
Application
Priority
- KR 20100116164 A 20101122
- KR 2011008926 W 20111122
Abstract (en)
[origin: WO2012070845A2] The present invention relates to a method of preparing a superabsorbent polymer, including the steps of: preparing a hydrous gel phase polymer by thermal polymerizing or photo-polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying the hydrous gel phase polymer; milling the dried polymer; adding a surface cross-linking agent to the milled polymer; and elevating the temperature of the polymer including the surface cross-linking agent at a speed of 3°C/min to 15°C/min, and carrying out a surface cross-linking reaction at 100°C to 250°C.
IPC 8 full level
C08J 3/24 (2006.01); B01J 20/26 (2006.01); C08F 20/18 (2006.01); C08F 220/06 (2006.01); C08J 3/075 (2006.01)
CPC (source: EP US)
B01J 20/267 (2013.01 - EP US); C08F 220/06 (2013.01 - EP US); C08J 3/075 (2013.01 - EP US); C08J 3/245 (2013.01 - US); C08J 3/247 (2013.01 - US); C08J 7/08 (2013.01 - US); B01J 20/3078 (2013.01 - EP US); B01J 2220/68 (2013.01 - EP US); C08F 222/102 (2020.02 - EP US); C08F 2500/14 (2013.01 - US); C08F 2810/20 (2013.01 - US); C08J 2333/06 (2013.01 - EP US); C08J 2335/00 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2012070845 A2 20120531; WO 2012070845 A3 20120927; EP 2643392 A2 20131002; EP 2643392 A4 20140430; EP 2643392 B1 20141231; KR 101290740 B1 20130729; KR 20120054836 A 20120531; US 2014058048 A1 20140227; US 8697812 B2 20140415
DOCDB simple family (application)
KR 2011008926 W 20111122; EP 11842769 A 20111122; KR 20100116164 A 20101122; US 201113824952 A 20111122